Instantly encode and decode text using JWT format. Our tool shows you exactly how your input transforms through the encoding process, with real examples and explanations suitable for developers, students, and security researchers.
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Open Text Encoder/Decoder →JSON Web Tokens (JWT) are Base64url-encoded tokens used for authentication and data exchange. Each JWT consists of three dot-separated parts: header, payload, and signature. Our decoder reveals the header algorithm and payload claims without verifying the signature, useful for debugging authentication flows.
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